M500M-4-20 Datasheet, PDF (1/2 Pages) Systemsensor advanced ideas. – Analog Input Module

M500M-4-20
Analog Input Module
The System Sensor M500M-4-20 analog input module
demonstrates our commitment to offer solutions for
all applications.
Features
• SEMS screws for easing wiring
• Panel controlled status LED
• Analog communications
• Rotary address switches
• Low standby current
• Mounts in standard 4 inch junction box
The M500M-4-20 Analog Input Module allows the connection
of 4-20 mA output sensors to a fire alarm control panel (FACP). The
module converts the sensor output to a common communication
protocol that can be interpreted by the FACP for monitoring and
display. There are numerous sensors available in the marketplace
that communicate using a 4-20 mA output, including gas sensors,
temperature sensors, air speed sensors, and more.
The M500M-4-20 Module includes numerous safeguards and
protective features to ensure trouble-free operation. The module
accepts both 3-wire (device sink) and 2-wire configurations. The
external power supply is isolated from the communication line. In
addition, a 500 mA current limiter and a cutoff circuit protect the
module’s electrical supply from short circuits. In the event of a
short, the output voltage will cycle within safe limits until the short
is removed. The output signal is sampled and filtered for transients
and noise prior to passing the signal on to the FACP. If the current
running through the sensing circuitry exceeds 25 mA, the output
voltage will shut down and the short protection process will begin.
As with all of the System Sensor intelligent modules, the
M500M-4-20 Analog Input Module is rigorously designed and
tested for electromagnetic compatibility and environmental
reliability, in most cases exceeding industry standards. The device is
equipped with a panel-controlled red LED for local status indication.
The standard SEMS terminals will accept wiring from 18ga to 12ga
(AWG).
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